Measurement of the WW cross section in √s=7 TeV pp collisions with the ATLAS detector and limits on anomalous gauge couplings

Journal

Physics Letters B

Volume | Issue number

712 | 4-5

Pages (from-to)

289-308

Document type

Article

Faculty

Faculty of Science (FNWI)

Institute

Institute for High Energy Physics (IHEF)

Abstract

This Letter reports a measurement of the WW production cross section in √s=7 TeV pp collisions using data corresponding to
an integrated luminosity of 1.02 fb−1 collected with the ATLAS detector. Using leptonic decays of oppositely charged W bosons,
the total measured cross section is σ(pp→WW) = 54.4 ± 4.0(stat.) ± 3.9(syst.) ± 2.0(lumi.) pb, consistent with the Standard
Model prediction of σ(pp→WW) = 44.4 ± 2.8 pb. Limits on anomalous electroweak triple-gauge couplings are extracted from a
fit to the transverse-momentum distribution of the leading charged lepton in the event.

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